Step-down converter B2B241260

regulatedvehiclefor marine applications

Short description
Input to output: 24V→12V. Max charge current: 12V/60A. Supported main battery types: GEL, Sealed lead acid, Flooded, AGM, LiFePO4, Lithium-ion. Size: 190×215×70 mm. Weight: 1.6 kg. Warranty: 2-year.

Overview
DC-DC charger for charging an auxiliary/main 12V battery from a 24V vehicle starter battery or solar input (on supported models). Engineered for motorhomes, campers, boats and similar mobile applications where reliable battery-to-battery charging is required.

B2B Charge

• Charges the main battery via the vehicle alternator and starter battery.
• Can transfer charge between two batteries when used off-vehicle.
• Provides full-power charging from the alternator while the engine runs for rapid recharge.
• Boosts or steps down voltage to follow the specified charge profile (CC, CV, trickle/float) for the selected battery type.

MPPT Solar Charge

• Integrated MPPT increases solar charging efficiency by approximately 10–30% compared with non‑MPPT controllers.
• Regulates current and voltage to follow the standard charge curve for the selected battery chemistry.
• Includes a maintenance/trickle mode to preserve the starter battery during long periods of inactivity.

Technical Parameters (table)
Model: B2B241260
Input - Vehicle starter battery type: Lead acid / Lithium batteries
Input - Vehicle starter battery voltage: DC 24V (21–32V)
Input - D+ signal voltage: 16–32V
Input - Vehicle starter battery capacity: 80–100 Ah
Output - Auxiliary/Main battery type: GEL (14.3V), Sealed (14.4V), Flooded (14.7V), LiFePO4 (14.6V), Lithium-ion (12.6V)
Output - Auxiliary/Main battery voltage: 12V
Max charge current: 60A
Working mode: Battery-to-battery mode
Charge process: CC, CV, Trickle/float
DIP switch: Select battery type via DIP switch
Stand-by current: 16 ± 2 mA
Protections: Over-charge, over-current, over-voltage
Operating temperature: -20℃ to 50℃
Dimension: 190 × 215 × 70 mm
Weight: 1.6 kg
Accessories: Display (MT-2), Bluetooth module (BT10), Temperature sensor (TRS)

Model family & other model tables
DC12V → DC12V examples: B2B1230 12V→12V 12V/30A; B2B1260 12V→12V 12V/60A; BS126030 12V→12V 12V/30A (solar 12V/20A, max panel 250W); BS126045 12V→12V 12V/60A (solar 12V/45A, max panel 620W).

DC12V → DC24V examples: B2B122425 12V→24V 24V/25A; BS12242530 12V→24V 24V/25A (solar 24V/30A, max panel 820W).

DC24V → DC24V examples: B2B242450 24V→24V 24V/50A; BS24245030 24V→24V 24V/50A (solar 24V/30A, max panel 820W).

DC24V → DC12V (this product): B2B241260 24V→12V 12V/60A; BS24126050 24V→12V 12V/60A (solar 12V/50A, max panel 685W).

Specifications

• Model: B2B241260
• Input (vehicle starter battery voltage): DC 24V (21–32V)
• Input - starter battery type: Lead acid / Lithium batteries
• D+ signal voltage: 16–32V
• Starter battery capacity supported: 80–100 Ah
• Output battery types supported: GEL, Sealed, Flooded, LiFePO4, Lithium-ion
• Output voltage: 12V
• Maximum charge current: 60A
• Working mode: Battery-to-battery
• Charge process: Constant Current (CC), Constant Voltage (CV), Trickle/float
• DIP switch selectable battery types
• Stand-by current: 16 ± 2 mA
• Protections: Over-charge, over-current, over-voltage
• Operating temperature range: -20℃ to 50℃
• Dimension: 190 × 215 × 70 mm
• Weight: 1.6 kg
• Accessories: Display (MT-2), Bluetooth module (BT10), Temperature sensor (TRS)
• Warranty: 2-year